Fellows
/Senior Distinguished
Researchers
/Distinguished
Researchers

Awards

• "Multi-photon absorption observed in a superconducting flux qubit", the Young Scientist Presentation Award at the Japan Society of Applied Physics (JSAP) Spring Meeting (2004).

Academic Activities

• The Japan Society of Applied Physics, Superconductors Division, Board member (2013-).
• The IEICE (Institute of Electronics, Information and Communication Engineers) Transactions on Electronics, Guest associate editor (2020-2021).
• Kyushu University Innovator Fellowship in Quantum Science, External committee member (2021-).
• Superconducting Qubits and Algorithms Conference, Scientific advisor (2022-2023).
• The Japan Society of Applied Physics, Quantum Information Technology Group, Vice-chair (2023-).

Visiting Professor

• Delft University of Technology, visiting researcher (2005-2006).
• National Institute of Informatics, visiting associate professor of Funding Programfor World-Leading Innovative R&D on Science and Technology (2012-2015).
• Tokyo Universityof Science, visiting associate professor (2012-2020).
• Tokyo Universityof Science, visiting professor (2021-).

Publications

Books

• Electron Spin Resonance Detected by Superconducting Circuits in "Hybrid Quantum Systems", edited by Y. Hirayama, K. Ishibashi, and K. Nemoto, Springer Verlag, Singapore 2022.
• Superconductor-Diamond Hybrid Quantum System in "Principles and Methods of Quantum Information Technologies", edited by Y. Yamamoto and K. Semba, Springer Japan 2016.

Papers

1. H. Toida, K. Sakai, T. F. Teshima, M. Hori, K. Kakuyanagi, I. Mahboob, Y. Ono, and S. Saito, "Magnetometry of neurons using a superconducting qubit", Commun. Phys. 6, 19 (2023).
2. L. V. Abdurakhimov, I. Mahboob, H. Toida, K. Kakuyanagi, Y. Matsuzaki, and S. Saito, "Identification of Different Types of High-Frequency Defects in Superconducting Qubits", PRX Quantum 3, 040332 (2022).
3. L. V. Abdurakhimov, I. Mahboob, H. Toida, K. Kakuyanagi, and S. Saito, "A long-lived capacitively shunted flux qubit embedded in a 3D cavity", Appl. Phys. Lett. 115, 262601 (2019).
4. H. Toida, Y. Matsuzaki, K. Kakuyanagi, X. Zhu, W. J. Munro, H. Yamaguchi, and S. Saito, "Electron paramagnetic resonance spectroscopy using a single artificial atom", Commun. Phys. 2, 33 (2019).
5. F. Yoshihara, T. Fuse, S. Ashhab, K. Kakuyanagi, S. Saito and K. Semba, "Superconducting qubit-oscillator circuit beyond the ultrastrong -coupling regime", Nat. Phys. 13, 44 (2017).
6. K. Kakuyanagi, Y. Matsuzaki, C. Deprez, H. Toida, K. Semba, H. Yamaguchi, W. J. Munro, and S. Saito, "Observation of collective coupling between an engineered ensemble of macroscopic artificial atoms and a superconducting resonator", Phys. Rev. Lett. 117, 210503 (2016).
7. G. C. Knee, K. Kakuyanagi, M.-C. Yeh, Y. Matsuzaki, H. Toida, H. Yamaguchi, S. Saito, A. J. Leggett and W. J. Munro, "A strict experimental test of macroscopic realism in a superconducting flux qubit", Nat. Commun. 7, 13253 (2016).
8. H. Toida, Y. Matsuzaki, K. Kakuyanagi, X. Zhu, W. J. Munro, K. Nemoto, H. Yamaguchi, and S. Saito, "Electron Paramagnetic Resonance Spectroscopy Using a Direct Current-SQUID Magnetometer Directly Coupled to an Electron Spin Ensemble", Appl. Phys. Lett.108, 052601 (2016).
9. T. Tanaka, P. Knott, Y. Matsuzaki, S. Dooley, H. Yamaguchi, W. J. Munro, and S. Saito, "Proposed Robust Entanglement-based Magnetic Field Sensor beyond the Standard Quantum Limit", Phys. Rev. Lett. 115, 170801 (2015).
10. X. Zhu, Y. Matsuzaki, R. Amsuss, K. Kakuyanagi, T. Shimo-Oka, N. Mizuochi, K. Nemoto, K. Semba, W. J. Munro, and S. Saito, "Observation of dark states in a superconductor diamond quantum hybrid system", Nat. Commun. 5, 3424 (2014).
11. S. Saito, X. Zhu, R. Amsuss, Y. Matsuzaki, K. Kakuyanagi, T. Shimo-Oka, N. Mizuochi, K. Nemoto, W. J. Munro and K. Semba, "Towards Realizing a Quantum Memory for a Superconducting Qubit: Storage and Retrieval of quantum states", Phys. Rev. Lett. 111, 107008 (2013).
12. X. Zhu, S. Saito, A. Kemp, K. Kakuyanagi, S. Karimoto, H. Nakano, W. J. Munro, Y. Tokura, M. S. Everitt, K. Nemoto, M. Kasu, N. Mizuochi and K. Semba, "Coherent coupling of a superconducting flux qubit to an electron spin ensemble in diamond", Nature 478, 221 (2011).
13. X. Zhu, A. Kemp, S. Saito, and K. Semba, "Coherent operation of a gap-tunable flux qubit", Appl. Phys. Lett. 97, 102503 (2010).
14. F. Deppe, M. Mariantoni, E. P. Menzel, A. Marx, S. Saito, K. Kakuyanagi, H. Tanaka, T. Meno, K. Semba, H. Takayanagi, E. Solano, and R. Gross, "Two-photon probe of the Jaynes-Cummings model and controlled symmetry breaking in circuit QED", Nat. Phys. 4, 686 (2008).
15. A. Lupascu, S. Saito, T. Picot, P. C. de Groot, C. J. P. M. Harmans, and J. E. Mooij, "Quantum non-demolition measurement of a superconducting two-level system", Nat. Phys. 3, 119 (2007).
16. K. Kakuyanagi, T. Meno, S. Saito, H. Nakano, K. Semba, H. Takayanagi, F. Deppe, and A. Shnirman, "Dephasing of a superconducting flux qubit", Phys. Rev. Lett. 98, 047004 (2007).
17. J. Johansson, S. Saito, T. Meno, H. Nakano, M. Ueda, K. Semba, and H. Takayanagi,　"Vacuum Rabi oscillations in a macroscopic superconducting qubit LC oscillator system", Phys. Rev. Lett. 96, 127006 (2006).
18. S. Saito, T. Meno, M. Ueda, H. Tanaka, K. Semba, and H. Takayanagi, "Parametric control of a superconducting flux qubit", Phys. Rev. Lett. 96, 107001 (2006).
19. S. Saito, M. Thorwart, H. Tanaka, M. Ueda, H. Nakano, K. Semba, and H. Takayanagi, "Multiphoton transitions in a macroscopic quantum two-state system", Phys. Rev. Lett. 93, 037001 (2004).

Keywords

• Superconducting quantum circuits, Macroscopic quantum physics, Quantum information technology, Quantum computing, Quantum sensing